基于OpenGL的地球模型仿真方法研究  

Simulation Method of the Earth Model Based on OpenGL

作　　者：李伟英[1] 程效军[1,2] 张小虎[1] 

机构地区：[1]同济大学测量与国土信息工程系,上海20009 [2]现代工程测量国家测绘局重点实验室,上海200092

出　　处：《科学技术与工程》2009年第22期6624-6629,共6页Science Technology and Engineering

摘　　要：地球模型的三维可视化在google earth等商业软件中已有所体现,但对其核心方法鲜有系统性的研究。OpenGL作为强大的三维图形函数库,能够支持用户便捷地实现三维模型的建模及渲染输出。地球模型仿真中的球体建模、纹理映射、旋转和缩放等涉及很多复杂的计算机图形学知识以及算法,可以使用OpenGL提供的函数方法予以实现。使用OpenGL提供的建模和纹理映射函数,建立了贴合纹理的地球模型;探讨了模型视图矩阵的特性和内涵,然后使用实时保存模型视图矩阵的方法,实现了地球模型围绕三维坐标轴旋转的功能。The 3D visualization of earth model has been achieved in business software such as google earth,but the core method of it has seldom been discussed.As a powerful 3D-graphics library,OpenGL is able to support 3D modeling and rendering conveniently.Spherical modeling,texture mapping,rotation and scaling in the simulation involve much knowledge of complex computer graphics as well as the algorithm,which can use the OpenGL function to achieve.Using the modeling and texture mapping functions in OpenGL,the texture-mapped earth model is established; the characteristics and meaning of the model view matrixes are discussed, and then by saving the real-time matrix, the earth model rotation revolving around three axes is achieved.

关 键 词：球体建模 纹理映射 模型视图矩阵 绕坐标轴旋转 

分 类 号：P282[天文地球—地图制图学与地理信息工程]